Find the input x when the output y is 45

What is f(3) for the quadratic function f(x)= 2x^2+ + x - 12

Mr and mrs smith buy tickets for themselves and their four children. the cost of an adult ticket is ? 6 more than the adult ticket. the total cost of the six tickets is ? 40.50 work out the cost of an adult ticket. in your working let c be the cost of the child ticket and a be the cost of the adult ticket.

Match each function with its rate of growth or decay